Calculate the area under the graph of y = e^-x above the x-axis for the interval [1, ∞]

Question

a) 0
b) e^-1 ------> my answer. Can you check for me, please?
c) -e^-1
d) infinity

Answer 1

area= int e^-x from 1 to inf
= -e^-x over limits= -e^-inf + e^-1
your are right.